Light projector



S. 'L. LEBBY new; PROJECTOR Filed mg. 1, 15122 Dec. 9, 2 I 1,518,155

,I 8 all 2 412 \1 m j 1 7 I E 6 i Pai/fld 7 pl INVENTOR j ATTORNEY concern} I "Be it known that I, Smrns 55mmmumm es JOOnnfrTGQ imvv-YO'RK.

eitiz en =ofgfthe Unite'dgStates, residin at- Corning,*in the county ofSteuben and tate- 6 of- New-York,-'-have invented certain newand useful Improvements in Light-Projectors, of F i which thefollowing e .ence being had. drawings.' X.,-;

1 10 My present invention make to;-

ali nmg-the beam desired direction.

The invention furtherincludesthe novel and arrangement arts 7 hereinafter de y defined by the apfeatures of" construction and-combination of Z scribedi andparticular ended claims. I

' embodiment o invehtmn is top ,..---:ksiinply eonstructedmeans'ffi-ifocusing. and

of lighttherefromm the-i v v i f ;lj us ngqtargetor screen 12, as will be -hereinafter idescribed. Necessarily the my invention is illus is a specification, refer therein to 'theaccolnpany ng" other;

trated the accompanymg drawings in which':- ,nF gure 1, is a vertical section taken centrally though the complete lamp or projector; the forward part being broken away and shown in perspective for; clearness of illusi iii tration.-

an ZiFig. 3, isa for- =-foeusing the lamp.

g-iMy invention provides means whereby the Fig. 2, 1s afront view, partly in section,

\ lamp itself carries a targeton which the projeeted beam may be focused, inthe 'field,

without the use of a dark room,

and further provides means whereby 'fthe focused beam "ea-1 may be accurately 15 ple gun sights, and

methods directed byrthe use of sim- Without the necessityfof .employ'mg; telescopes or complex aligning 59' -.provided ,adamp housing 5 of the usual type,

of horizontal cylindrical Eigure- 1. A reflector or in any suitable manner 'iin'the housing so that the "axis of the mirror .will coincidewith the, axis :-.The ;',;front proye-k 3 iiients-iii light projectors andii'n particular it ,rel'atesitoaprojectionlampssuchassaremsed I l inrailway. -sig'nals ,I t is not limited {to such-T1 V "f msejhoweverpbeing advantageous.- in}; ,fbeingginad plane parallel to the V of the beam. detail plan view of the means of the light posedthat: its -ofthe opening peep hole: 15 itis pos respect-to; the target, even in daylight.

- -.-.ai iimaann gue1,1922;";s=aai' m.m,965;J

' in the baek of'the housing, such as by means Lnn Leanna of a cover]? that is.detachablyfastcned to the ho ;.'.ing by screws 8 or any otherdesired means Injsecuringthe'mirror in osition in .-.the 'housing,;iparticular care shou d be.used

inlo'catingthe niirroreeiitrallyand's'qu'arely r a. H of-the'housing. 0f theE -'housing is, closed by ns r deareformed;.witha'cl'reular opening 5 iapei ur qu'g' hich; thefili ht 6 passes, the opening 16 situations; where -aceurately}..focused light mal bea l, ight at'jthisi point, when the I beamgi 's pr perly adjusted. ,The, inner sur- A facefoff heater around the opening llfis 7 videflag iighly5efiective.projection lampwith c"preferabl spainted{'a dullli'rrht color, so that the open'1ng1isfclearlyjdefine when the lamp being' focused, and this portion of the lamp axis of thetargetYIZ formed by the door mirror 'and housing;

- Thehousing 5 has lixedto its front end a For the-purpose of observing the position beam within the housing 5, with respect to the focusing target 12, a' peep hole 15.1S"f0Ilfl(}(1 in the housing 5 near the rearof the lamp and eccentric to-the axial line thereof,- the peep holebeing so angularly dis- 11. By looking through the sible to see the'focusing target andto' properly focus the beam with In focusingtheprojected bea1n,'it is'first light spot is discernible-on the focusing tar c1112. Then the beam is adjusted so that'- its projectedspot -is accurately centered on 1 e s- 9 arr n -M ass.- lO--- act'diameterof the no r- I ,opening iscoincidentfjwith the, axis of the I the proper direction -05 axis will intersect the center spread so that the edge orperiphery of the A o5 the-target; spread of the beam is then .Q y 1,518,156, i

reduced by focusing it to'the exact diameter of the aperture 11 of the target, this being the redetermined exact normal focus. I

I- lave also provided improved means for accomplishing the necessary focusing and central adjustment of the beam, including a plate 16 slidably disposed on thebottom of the lamp housing 5, and having adjustable pin and 'slot connections 17 with the lamp housing, such that the plate may be adjusted longitudinally of the lamp, along the line parallel to the axis thereof, and when adj usted, ma be clamped in the desired position.

- Depen 'ing from the plate 16 is a hollow ta-.

threaded-on to its low ,pered extension 18 that passes through an.

opening 19 formed in th housing 5, and has split end, ,a knurled lock nut 20.

' Slidably'mounteclfor vertical adjustment, and for rotary adjustment in the extension 18 ofthe plate, is the lower tubular end 21 of '1 a hollow verticalstandard 22, the upper end" of :which carries the socket of an electric lamp bulb 23. i The,portion of the standard 22 above the plate 16, is preferably flattened, as slioWn,-soas. to occupy as small a space as possible in the path of the beam projected by the reflector 6.

The lamp or bulb 23 is mounted in the standard22 in such manner that its filament is off-set from th'ezaxis of the standard, so that rotary adjustment of the standard will effect a transverse adjustment of the iilament' relative to the axis of the reflector.

lVires 24, for supplying electric current to the'lamp 23 are passed upwardly through the interior of the hollow standard and are connected to the lamp socket in the usual manner; The lower end of the stand art]; is provided with a linurhri head 25 that is designed to be grasped when the lamp is being adjusted within the housing.

The lamp may be first accurately directed by the use of the sights 13 uudll, and the beamthen adjusted and focused. or thereverse procedure may be chosen if desired.

The beam can be vfocused and centered with respect to the focusing target l2 by first unscrewing the lock nut 2 suiliciontly to permit the-standard -22 10 hiraised orlowered to bring the lamp iiluiuent to the exact vertical position, and rotated to bring the filament to the exact horizontal posi- 'tion desired. This vertical and rotary udjustment will result in the positioning of the filamentin the axis of the reflector, and

- consequently in the axis of the housing and target. For obtaining a movement of the filament axially of the reflector, the plate 16 sired point is obtained.

may be adjusted. This plate is adjusted longitudinally of the housing by loosening the pin.and slot connections 17, and shiftthe plate in its adjusted position. It will be understood that after the desired adjustment mon axis, the several members of the proof the lamp, the lock nut 20 and the'pin and jectors; i. e., the reflector, the light source,

the housing, and focusing target, which necessarily results in bringing the axis of. v

the projected beam to the same common axis, so that the beam, though not discernible beyond the lamp, may be seen in" actual function and accurately focusedtand-positioned in the desired direction.

Having thus described my invention wh t Iclaim is:-./ i

sis

1. In a light-projecting device,-E*tliebination of a liglit source a concentrating I reflector 'for projecting a. signal beam, to a distance, a casing containing the light source and reflector, and having anoptically open end along the path ofthe beam, and a' target forming a part'of-the light-projecting device and having an opening of-a diameter substantially equal to the normal diameter; of the projected beam at the target,.or dir-ating the spread of the beamJ l' 2. 111' a light-projecting device, t

distance, a casing containing the light source h bination of a light source, a concentrating" reflector for projecting a signal beam toa:

and reflector, and having an optically open end along the path of the beam, and a target of annular form forming a part of the light projecting device and located around the axis of the projected beam, for indicating the spead of the beam.

3. In a light-projecting device, the-c0mbination of a target centered with respect to the axis of the projector and forming a part of the light-projecting device, and having an opening therein of a. diameter sub-.

stantially equal tothe normal diameter of the projected beam at the target, and means for centering the beam on the targetand i'ocusing it.

i. In a projector, the combination of a reflector, a cover glass for the projector, and a target arranged between the reflector and the cover glass for indicating the spread of light,

I 5. A light-projecting device including a light source, a reflector and a casing carrying the light source and reflector, a tar et'.

forming a part of the structure ofthe lig treflector, means fora. adjusting the' light'.

p5 projecting device for indicating the spread of light, and located around the axis ofiflthe.

the axis of which parallel the axis of the the reflector, the casing being provided with reflector. I 3 a peep-hoie through which the target may 6. In a light-projecting device, a casing, be observed. l a reflector and a light source carried by the In testimony whereof, I hereunto sign 5 easing, and a target forming apart of the my name.

st rqcture of-the light-projecting device for indlcating the spread of'a beam'projected by STATES LEBBY. 

